Finding the Fourth Proportional to 1,078,541.53, 1,617,692.78 and 386,081.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078,541.53 : 1,617,692.78 = 386,081.03 : x
2. Step 2: Convert to fraction form
   1,078,541.53/1,617,692.78 = 386,081.03/x
3. Step 3: Cross multiply
   1,078,541.53x = 1,617,692.78 × 386,081.03
4. Step 4: Simplify right side
   1,078,541.53x = 624,560,499,735.40
5. Step 5: Solve for x
   x = 624,560,499,735.40/1,078,541.53
6. Step 6: Final answer
   x = 579,078.77